Conductive nanocomposite hydrogels with self-healing property

Peng, Rengui; Yu, Yang; Chen, Sheng; Yang, Yingkui; Tang, Youhong

doi:10.1039/c4ra05381h

Cited by 48 publications

(42 citation statements)

References 31 publications

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“…9b-f. This means that the surface tension remains constant for all samples (samples [1][2][3][4][5], if only composition ratio changes. Without neutraliser, however (sample 6), the contact angle increased dramatically (Fig.…”

Section: Molecular Interactions In Wsrmentioning

confidence: 97%

“…Due to the presence of a three-dimensional network, SAPs can absorb and retain a large amount of water increasing in volume a hundred-or thousand-fold without dissolving in the water. SAPs are used in a variety of applications such as medicine, sanitary goods, the food industry and agricultural and horticultural applications [1][2][3][4][5][6]. Despite the capacity of SAPs to absorb large amounts of water, they do not have enough gel strength for certain applications.…”

Section: Introductionmentioning

confidence: 99%

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Neutralisation and compatibilisation effects on novel water-swellable rubber composites

et al. 2015

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A novel water-swellable rubber (WSR) composite, modified by a compatibiliser, was prepared by blending poly(dimethylsiloxane) rubber (PDMS) as a matrix and poly(acrylic acid) (PAA) partially neutralised by sodium hydroxide (NaOH) as a superabsorbent polymer. The addition of hydrophilic PAA into hydrophobic PDMS improved water swelling ability but without good durability, mainly due to the poor interfaces between PAA and PDMS. Meanwhile, the tensile properties of the WSR before and after swelling decreased dramatically. With NaOH added as the neutraliser for PAA or with aminopropyltriethoxysilane added as the compatibiliser for PDMS and PAA, water swelling ability and/or durability increased. However, when the compatibiliser and the neutraliser were added together, the water swelling ability and durability of the WSR composites further increased by virtue of the synergistic effects due to the increased interfacial cohesion between the PDMS and PAA.

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Section: Molecular Interactions In Wsrmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Neutralisation and compatibilisation effects on novel water-swellable rubber composites

et al. 2015

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“…This result confirmed that the contribution of HB can cause the formation of PAA-based hybrid materials, in which mechanical and other properties could also be changed. 4 …”

Section: Molecular Interactions Within Hydrogelsmentioning

confidence: 99%

“…[1][2][3] As enviro-sensitive materials, hydrogels have been widely used for industrial and biomedical applications due to their unique structure and capabilities. [4][5][6] The properties of a specific hydrogel are extremely important in selecting which materials are suitable for a given application. The suitability of a hydrogel for a given application depends on the mechanical properties that are affected by the environmental conditions such as temperature, pH level and ionic strength, magnetic and electric fields as well as the monomer type and crosslinking agents.…”

Section: Introductionmentioning

confidence: 99%

In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

Dehbari

Tavakoli

Khatrao

et al. 2017

Mater. Chem. Front.

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a Hydrogels have been extensively investigated for use in various applications. Poly acrylic acid (PAA) is a common example, which has been widely used due to its super hydrophilicity properties, biocompatibility and biodegradability characteristics. However its poor mechanical properties, which have been addressed in many research studies, are known as a drawback that limits its applications. So, enhancing PAA mechanical properties using a hyperbranched polymer (HB) is the key question to be addressed in this research.Investigations of the mechanical properties of the PAA-HB hydrogel revealed 130% improvement in the ultimate tensile strength, indicating a two times enhancement compared to that of PAA. Statistical analysis showed that the overall effect of introducing notches (with different depths) on the selected mechanical properties of both PAA and PAA-HB was significant. Mechanical characterization of PAA-HB networks showed that significant improvement in the mechanical properties was achieved as the capability of water uptake increased by 20%. Characterization of the physical properties confirmed that participation of HB may form a PAA based hybrid material with good swelling properties. Those findings are attributed to the supramolecular structure of the HB, which can introduce physical entanglement between the PAA network structure and increase the crystallinity of the final hydrogel as compared to those from the PAA hydrogel.

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“…11,27 The incorporation of conducting fillers into a self-healing matrix (e.g. intrinsic self-healing gels 26,[28][29][30][31] and polymers 7,22,32 ) to form selfhealing composites is an attractive strategy to achieve conductors which intrinsically self-heal at ambient temperature. These composites have an advantage that their self-healing function can serve multiple times, promising repeatable recovery of mechanical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Multiwalled Carbon Nanotube-Reinforced Polyborosiloxane Nanocomposites with Mechanically Adaptive and Self-Healing Capabilities for Flexible Conductors

Chen

2016

ACS Appl. Mater. Interfaces

108

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Intrinsic self-healing polyborosiloxane (PBS) and its multi-walled carbon nanotube (MWCNT)-reinforced nanocomposites were synthesized from hydroxyl terminated poly(dimethylsiloxane) (PDMS) and boric acid at room temperature. The formation of Si-O-B moiety in PBS was confirmed by Fourier transform infrared spectroscopy. PBS and its MWCNT-reinforced nanocomposites were found possessing water or methanol activated mechanically adaptive behaviors; the compressive modulus decreased substantially when exposed to water or methanol vapor and recovered their high value after the stimulus was removed. The compressive modulus was reduced by 76%, 86%, 90% and 83% for neat PBS and its nanocomposites containing 3.0 wt.%, 6.2 wt.% and 13.3 wt.% MWCNTs, respectively, in water vapor, and the modulus reduction activated by methanol vapor was greater than by water vapor. MWCNTs at higher contents acted as a continuous electrical channel in PBS offering electrical conductivity, which was up to 1.21 S/cm for the nanocomposite containing 13.3 wt.% MWCNTs. The MWCNT-reinforced PBS nanocomposites also showed excellent mechanically and electrically self-healing properties, moldability and adhesion to PDMS elastomer substrate. These properties enabled a straightforward fabrication of self-repairing MWCNT/PBS electronic circuits on PDMS elastomer substrates.

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Conductive nanocomposite hydrogels with self-healing property

Abstract: A flexible, electrically conducting hydrogel with self-healing repeatability can be of use in emerging fields such as soft passive resistors–capacitors and electro-active soft sensor devices, but combining all these properties remains a challenging task.

Cited by 48 publications

References 31 publications

Neutralisation and compatibilisation effects on novel water-swellable rubber composites

Neutralisation and compatibilisation effects on novel water-swellable rubber composites

In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

Synthesis of Multiwalled Carbon Nanotube-Reinforced Polyborosiloxane Nanocomposites with Mechanically Adaptive and Self-Healing Capabilities for Flexible Conductors

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